Answer:
Didn't Beowulf cut off Grendel's arm and he ended up bleeding out.
Everything else seems right.
Explanation:
Basically that us as people are in charge of our life’s and destiny. We make are own choices.
The supporting details should offer this.
The technique that this sentence best illustrates is understatement.
Understatement means that you are not showing the full 'strength' of something, but it is rather understated - so here, the coach only said that 'he was glad' even though his team won the Super Bowl, which is a huge deal. So his emotions should have been way stronger.